Census size
The next questions (Q42-Q49) are related to population census size (Nc) data. They will only appear if ‘Yes’ was selected in Q21. It is assumed that the Nc estimates are from visual/expert estimates based on counts of individuals (or models from such counts); however, this might not always be the case. There may in stances, for example, that Nc is based on available habitat and estimates inferred from other known densities, and not actual count data. Please make note of this in Q50 (any additional comments or notes on this population).
Nc can be provided as a range OR point estimate, and there may be instances where Nc is only known for some, but not all populations of a species. For populations with unknown Nc, select ‘point estimate’ in Q42, and enter -999 in Q46.